Signor to siemens-schuckertwerke gesellschaft mit beschrxnkter



\ I 16,525 11 7 E. ALTENKIRCH Re REFHIGERATING APPARATUS OF THE ABSORPTION TYPE Original Filed August 14, 1922 Reissued Jan. 11', 1927.

' UNITED STATES PATENT OFFICE.

-SIGNOB '10 SIEMENS-SCHUCKERTWERKE GESELLSCHAFT' HAFTUNG, OF SIEMENSSTADT, NEAR BERLIN, GEBMANY A GERMAN (303F035:-

TION.

BEFRIGERATING APPARATUS OF THE ABSORI 'TION TYPE.

, Original No. 1,455,701, dated May 15, 1923, Serial No. 581.775, filed August 14', 1922. Applicttion for reissue filed December 1,

This invention relates to refrigerating apparatus of the absorption type. In known apparatus of this type the gas-enriched liquid is caused to pass from the part-0f the apparatus termed t e absorber by means of a pump into a hig pressure'chamber in which it is deprived of gas by beat, this chamber being herein termed the boiler. This pump is the most delicate part of the apparatus, and the chief object of the present invention isto render it unnecessary.

According to:' the invention the absorber is arranged at such a height above the inlet of the boiler that the column of liquid in a conduit interposed between the absorber and the boiler maintains'the necessary difference of pressure between the said absorb er and the said boiler.

In order that the said invention may be clearly understood and readily carried into effect the same will now be described more fully with reference to the accompanying drawin in which The gure is a section showing a constructional form of apparatus in accordance with the invention.

In the drawing, the absorber is indicated b 1 and the boiler is indicated by 2. The a sorber'and boiler are connected together by a pi e 3. A second pipe 114 which leads upwar s to the absorber 1, dips at its lower end into the liquid contained in theboiler 2. The absorber 1 is surrounded by'a coolin jacket 4 having an inlet 5 and an outlet 6 or the cooling medium. The boiler 2 is laced in a chamber 7 having an inlet openmg 8 and an outlet 0 ening 9 for the heating medium. Next to t e boiler 2 is arranged the condenser 13 and between them is placed 1 a partition 101 of such a height as to prevent any liquid from pa ing from one chamber into the other, w i121 the as spaces are in communication with each ot er. The condenser 13 is surrounded by a cooling device 15 having an inlet 16 and an outlet 17 for the cooling medium. Next to the absorber 1 is arranged the evaporator 19 with a partition 102 between the two to avoid any exchange of liquid, without however" preventing the gases or vapours from passing over. A pipe 18 which opens into the evap- 1926. Serial No. 152,040.

orator 19, dips into the liquid contained in the condenser 13. The evaporator 19 is surrounded by a acke't 20 throu h which passes the medium to becooled."- The said medium is admitted at 21 and escapes at 22. The liquid used in the working of the apparatus can be any desired binary mixture which should be selected to suit the pressures employed in the apparatus and the temperatures to be ultimately obtained. For instance, sulphuricacid and inter could be used, in which case the absorber 1 as well as the boiler 2 will contain a mixture of sulphuric acid and water, and the condenser 13 and the evaporator 19 pure water. I

The working of the apparatus is as follows :Owing to the heating to which the water and sulphuric acid mixture is sub jected in the boiler 2 steam is expelled and passes'into the condenser 13 in which the steam is condensed by cooling. A few bubbles of steam are also produced in the lower part of the pipe 114, and rise in the said pipe. This results in an upward movement of the liquid in the pipe 114, although at rst the said movement will be a. slow one. W en the heated liquid reaches he upper part of the said pipe, its pressure will decrease. and owing to the said decrease of pressure more steam bubbles will be formed which will also rise in the pipe 114 and contribute to the upward movement of the liquid. As soon as the sulphuric acid deprived of water reaches the absorber 1, it is cooled by the cooling jacket 4. Consequently it absorbs the steam or water coming from the evaporator 19, and then sinks into the. boiler 2 through the pipe 3. The water formed in the condenser 13 by the condensation of the steam rises in the pipe 18, partly owing to the existence of a higher pressure in the condenser 13. Owing to the relief from pressure in the upper part of the pipe 18 steam bubbles will be formed which will contribute to the rising of the liquid. The water is then vaporized in the evaporator 19, and effects cooling of the medium flowing through the jacket 20. As'will be seen from the drawing no pump is required nor are anythrottling or regulating valves necessary.

The apparatus'is not limited to its use for refrigerating alone as the heat generated can also be utlhy ed in any desired manner as is known'in existing refrigerating apparatus.

i through the pipe coils it may not be allowed After the oooling Water has passed simply to run OK but its heat may be utilized in any suitable manner. Any other liquid or gaseous medium can also be used for being heated and subsequently employed (for example) for heating, saturating, chem-i ical or other purposes by passing it through the pipe coils.

What I claim and desire to secure by Letters Patent of the United States is 1. In refrigerating apparatus of the absorption type the combination of a boiler for containing an absorption liquid and.

heating means for disengaging a vapor from the absorption liquid, an absorber for containing an absorption liquid and a vapor to be absorbed, and uninterrupted-conduit interposed between the absorber and the boiler andadapted to convey the absorption liquid from the absorber to the boiler, and

means for maintaining a pressure difference betxi'een the boiler and the absorber, said means including ahydrostatic column of liquid in said conduit.

2. In refrigerating apparatus of the absorption type the combination of a boiler for containing an absorption liquid and heating means for disengaging a 'vaporfrom the absorption liquid, an absorber "for .containing an absorption liquid and a vapor to be absorbed, an uninterrupted eondni.t 'interposed between the absorber andfthe boiler and adapted to convcy the absorption liquid from the" absorber. to the boiler, means :for malntamlng a pressure ,dltference between said conduit, and another conduit between the boilerand the absorber for conveyingpart of the disengaged vapor aforesaid to:

the absorber, said conduit being formed to hold a continuous column of liquid.

In Witness whereof I affix my signature.

EDMUND ALTENKIRCH.

40 the boiler and the absorber, said means ineluding a hydrostatic column of liquid in' 

